|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Microstructure Evolution of AZ31B Mg Alloy during Bi-axial Fatigue Loading
||Sugrib Kumar Shaha, Dwayne Toscano, Hamid Jahed
|On-Site Speaker (Planned)
||Sugrib Kumar Shaha
To understand the deformation behavior of AZ31B Mg alloy in biaxial loading, forged hollow cylindrical samples were tested in proportional loading in-phase and out-of-phase. The dislocation morphology, it’s activity, and interaction were investigated. The geometrically necessary dislocation (GND) density distribution was calculated using an electron backscatter diffraction (EBSD) in Nye's tensor method. TEM analysis identified the type of slip and twinning system. A relatively high density of stacking faults, basal and non-basal dislocations were identified in the failed samples. In-phase loading displays deformation through tension twinning and basal slip. In contrast, under bi-axial loading reveals dual activation of basal 〈a〉 and prismatic 〈c+a〉 dislocations in 45° out of phase loading while 90° out of phase loading exhibits an additional type of dislocation of pyramidal 〈c〉.
||Magnesium, Other, Other